How To Deal With Cavity Occurred During Carbon Fiber Fleet Reinforcement?

Carbon fiber fleet reinforcement is the new reinforcement method adopting carbon fiber reinforcing material, enabling it to bear tensile stress, improve the components’ stress state and limit the emergence and development of cracks. Since 1980s, it has been researched for replacing rebars and prestressed concrete steel and been used as tensioning materials in prestressed concrete bridge, external materials in building and reinforcement materials in existing structures. 

Nanjing Mankate carbon fiber sheet

  During the construction of carbon fiber sheet reinforcement, cavity occurred often. In order to deal with it, we should analyze and summarize the reason firstly and apply suitable remedy to solve different reasons. There are several reasons causing the cavity:

1. The surface of concrete base is uneven, and using the wrong way to polish and level the surface.

2. The pasted carbon fiber sheet is out of flatness, and there is air left inside the sheet after using scrapper blade to eliminate air.

3. Uneven adhesive coating.

4. The carbon fiber sheet pasted at one time is too wide.

5. The corner radian is different.

In fact, most cavity occurred during carbon fiber sheet reinforcement are caused by uneven adhesive coating. As a result there is still air inside the carbon fiber sheet. According to the cavity acreage, we can adopt different solutions:

Firstly, if the there is little cavity, we can use needle injection. But this method is not often used for it can not make sure all cavity are eliminated. 

Secondly, if there is a large area of cavity, we can slice off the carbon fiber sheet including cavity(scabbling should be made), and use repair adhesive to repair and level the surface, then paste the carbon fiber sheet(make sure there is 100mm overlap at least ); use the scrapper blade roll on the sheet back and forth to eliminate all air inside it; coat the adhesive evenly. 

Nanjing Mankate carbon fiber sheet and carbon fiber adhesive

Carbon fiber sheet reinforcement itself can not give full use of its vigorous mechanical property and superior durability, therefore we should use epoxy resin adhesive to adhere carbon fiber to the surface of reinforced concrete, and integrate it with the reinforced concrete, which finally enables the carbon fiber sheet to play its capacity of reinforcement. Nanjing Mankate carbon fiber sheet matched with carbon fiber impregnating adhesive turn into carbon fiber composite material, constitute preeminent carbon fiber sheet enhanced system.

After reading these information, have you knew how to deal with cavity occurred during the carbon fiber reinforcement? If you have interest in Mankate carbon fiber impregnating adhesive? Come on and take a look! 

                                          Editor: NJMKT

The copyright is reserved by www.nj-mkt.com. If reprint please indicate its source.